Pneumatic valve and seat.



` N0. 823,842. PATENTED JUNE 19, 1906.

G. P. EEAND. y PNEUMATIG VALVE AND SEAT.

APPLICATION FILED JAN. 31, 1905.

w Eff' jr# Z GEORGE PuBRAND, OF NEW YORK, N. Y.

PNEUMATIG VALVE AND SEAT.

specification of Letters Patent.

atented J une 19, 1906.

Application tiled January 31,1905. Serial No. 243,462.

To all whom it may concern:

Be it knownl that I, GEORGE P. BRAND, a citizen of the ,United States residin in the ci ty of New York, borough of Man attan, county and State of New York, have invented certain new and useful Improvements in vPneumatic Valves and Seats, of which the following is a specification sufficient to enable others skilled in the art to which theinvention a pertains to make and use the same. Hereto ore it has been customa to adjust valves of this class upon their stems 1n regulating their relation to their seats. In other words, each seat has a iixed prescribed position when in place with relation to which the valve is adjustable. This is ob'ectionable in that if a change in extent of t ow o1" valve movement is desired the valve-seat has to be removed bodily to ive access to :the valve and stem, and even t en the operation is inconvenient and uncertain and lackin in delicacy, since the de ee of adjustment as to be guessed 'at and tgt; result cannot be definitely ascertained untll the seat is again secifically.

cured in place. These disadvantages appertain also to the preliminary adjustment of the valve as well as to subsequent changes .abovereferred to. f My invention consists in the specific construction and arrangement of arts hereinafter described and claimed, wiereby I am enabled to quickly and conveniently adjust the relationof the parts with the greatest' accuracy and without the removal or vdisplace-- .ment of either. Thus after-the prelimina adjustment of the valve upon its stem. 1t need not be moved or changed in position, since the extent of throw may be increased or diminished by re ating the position of the seat, and when t s is provided for by a screw-thread upon the barrel' of the valveseat engaging witha thread in the seatlate substantially as herein described and s own it is obvious that great accuracy and delicacy of* adjustment may be attained, since the screw adjustment 1s essentially micrometric in character;

Incidental features of to the particular construction as hereinafter described. and

my invention relate of the partys; claimed sp'e-v In the accompanying drawin s, Y a sections [view of a portion of t e chestwork of pnedm atie ap aratus suicient to illustrate the practica ap lioation of my invention. Fig. 2 is a si ar view illustrating a A orother part to Figure 1 is' `vation of the outer end of the adjustable valveseat; Fig. 6, a similar view, the Ycross or guidebar being omitted. Fig. 7 is a section upon plane of llne 7 7, Fig. 5.

I have herein shown more call parts of pneumatic a paratus essential in i lustrating the practica use and application of my invention, although I do not limit myself in this respect, since the essential features of the invention or less symbolithe seat or face side may nous forms and classes o pneumatic valves and apparatus. With this understanding a.

'represents a portion of'chestwork, having the tension-chamber t communicating with the yalve-chamber c through the port t,' the valve-chamber c communicating with the atmosphere through the valve-seat body s and with a pneumatlc or other device to be actuated through the port b.

f is a stationary valve-seat for the ort t.

'v is a valve secured to the rod r iiy any suitable means, as by the leather nuts w w, en aging the screw-thread 1" on the valverod 1' in the usual manner.

The bo'dy s of the adjustable valve-seat is cylindrical externally and formed with a male screw-thread s2 forengagem'ent with afemale screw-thread p,

which the adjustable valveseat ais applied. It is to be understood in this connection that I herein use the term adjustable valve-seat s as applying to the valve-seat piece as a whole, the face lor seat proper being designated by the character s" and being preferably, through not necessarily, of annular form. j, s3 s? are shoulders formed in or on the outer ed e or portion of the adjustable seat s to faci itate its rotation upon 1ts axis by means of a suitable implement when in enga ement with the screw-thread p in the seat-p ate P or other support.

The primary objectv being to support the valve-seat s in such manner that it 1s adjustformed in 'the seat-plate P able with relation to the valve u, it obvious rthat'ths adjustment may be effected b resort to various well-known mechanica expedientsfalthu hv the cylindrical form of lvalve-seat and t herein shown is preferable on account of simplicit Furthermore, it affords accuracy and elicac of adjustment in a high degree, since consi erably less than a complete rotae use of screw-threads as IIO tion of the valve-seat upon its axis may be resorted to in eiiecting its'iinal adjustment in position. It is to be remembered also that this adjustment is attained without removing or disturbing the seat-valve or any other part. A valve-seat of this form also affords a convenient means of support for a cross bar or guide g for the outer end of the uide-rod 1^. Thus a guide-bar g, formed wit i the eye g) and preferably'of wco'd or other relatively j soft compressible or iibrous material, may be forced upon or into the outer end of the valveseat s, as shown, the underlying `edge or portion being rough'ened or upset by any dev"sired means, `as 'at s4, Fig.V 6, to increase the frictio'nal contact and hold the cross-bar in place by positive engagement therewith.

` drawings.

While it is desirable to thu's roughen the surface ofthe seat-body s for the urpose stated, still this is not an indispensab e feature ,since the elasticity of the material of which the guide-bar g is formed will `ordinarily insure its retention in position-after it 'has been forcibly 'seated within andu on the valveseat body, so that do not imit myself in this respect. Y In applying the cross-bar gto the valve-seat vs, `termed with the upset orrough'ene'd surfaces above referred to, i ind it expedient to insert the cross-bar in the end of the valve-seat between the unroughened portions and then turn it so as to force its ends inte intimate contact with such prepared surfaces, the protuberances thus forcing themselves into the relatively seit ends of' the 'crossbar laterally, and thereby locking itin position 'against a'ccidental displacement. The gnidin -eye g is drilled in the cross-bar g after the atter is thus placed and secured in position lso as to -insure its perfect 'centralization with relation to the seat s.

The ends of the cross-bar or guidefoar g are preferably formed with lshoulders g2, whic overlap the edge of the valvefseat, and thereby limit the rotrusicn of the guidepiece into the va ve-seat and insure the pro er 'alinement of the eye g with relation to t e valve-rod r. The opposite end 'of the valve-rod r rests against a disk on the diaphragm d' in the usual manner, the diaphragm being actuated through the port d m any well-known or desired manner and by any means that may be found most expedient inthe form of pneumatic y'apparatus to' which my improvements may beapplied I treat the female screw-thread; in the seatplate P with paralin to positively attain 1a perfectly air-'tight seal between the o posed surfaces Yofthe male and female threadh. l prefer to mount my adjustable valve'- seat `s upon a removable seat-plate P, substantially as vshown in Figs. 1 and 2 of the By this means I am `enabled to use an adjustable valve-seat ci' considerably less diameter than the valve-chamber, andthe valve-chamber in order to rovide for the insertion or removal of the va ve, c:

An important advantage attained by the use of my adjustable valve-seat is that I am thereby enabled to use a single 'valve in lieu of the two heretofore indispensable in avalvechamber of this character, owing to the fact 'that'adjustm'ent had to be mad-e with relation to each seat in the "chambe'r. A great saving is thus involved in 'the time heretofore essential in adjusting the two valves with relation to each other on their stem, so as te give only the desired play or extent 'of motion between the 'valve-seats. After primarily adjustinf5f the two valves in age'neral way they had to be inserted, the outer seat a plied, and their 'action tested, after which t e outer vseat had to be again removed, the valves :adjusted with more accuracy, and again replaced and tested. This operation might be necessarily repeated several times before the attainment ot a iinal and satisfactory adjustment or" parts. Furthermore, after Aactual use theconditions are modiiied and changed by the pressure lto which the parts are subjected,l so that in the old form the seat has again to be 'removed and the valves readjusted to compensate for the change. All these dih'iculties I obvia'te by a simple adjustment of my improved valveseat While position, at the same time saving the cost of one valve 'disk and leather Washers, and thereby simplifying and cheapenin the structure.

W at i claim as my invention, 4and desire to secure by Letters Patent, is`

i. in combination with a pneumatic valve, a metallic cylindrical valve-seat formed with a male screw-thread and with fa crosssbar having an eye for the support 'of the valverod, said cross-bar being formed of a rel`a tively soit material and b'eing'forced into pol sition on the valve-seat,-and a support formed with a female 'screw-thread for the reception ci said :cylindrical valve-seat, whereby the latter 'may be adjusted with relation to the pneumatic valve. f

2. in combination with a pneumatic valve, a metallic cylin'dncal valve-seatio'rrned with a male screw-thread, and with' A'rouglnened IIO reo l surfaces for contact Witha crossfbar ci 'rela'- y tively Ascit material, said cross-bar lcir'ned with an 'eye for guidance Tand "su port 'of the valye-rod, anda su' port 'forme j :a ile'- male screwjthread fdr the reception otsaid vcylindrical valveeseat, whereby the latter may be 'adjusted V"with relation to the pneu#- matic valve.

e. it Combineren wat a psaume@ vai-ve,

a lllindrical metallic valve-'seat foy-medwmh 'e periphezjal male Screw-tbree, e nieces-bei' having an eye for thesnppert of eyelve-ccii said cross-barebeing'ormed of relatively soft materiel with end shoulders fo; engagement with the rim of the Yalve-seetbody end being forced into position on said lVabre-seat' body with a pneumetic Valve,

a cylindrical valve-seat formed with e peiiphe eral male thread, and e removable seat-plete formed with a'female screw-thread for the ie ception endlsupport of seid cylindrical valve seat, for the purpose described.

5. In pneumatic appara-tus, the combination of e cylindrical Valve-seat body formed with e, valve-bearing consisting of the edge oi the cylinder of which tlie Valve-seat is ioi'med, seid cylindrical valve-seat being elso formed with an external periplierai male screwthread, e support for Seid adjustable cylindrical Valve-seat formed Witll e female thead for engegement with the male scieW-tbl'eefl on said Valve-seat, a pneumatic valve of gfeetei 'diameter tlie beni-ing edge of seid adjustable eyiindiicnl `7elve-seet, and e, seconey stetioney valve-sect for seid pneumatic valve, whereby t` e e; tent of motion ci" pley between the oL pcs-e Valve-seats may "ce yeiiecs. ici? the purpose desciibe.

6. in pneumatic eppaietus, the combinetion of e cylindical valve-sent body iorme with eveivebeei'ing consisting of the edge ci the cylindre? of which the Valve-seat is tonne-d, seid cylindrical Veive-seat being formed with an external peripheral nia-le screw-thread, e. i'emovabie valye-plete formeel. 'with cylindrical threaded boe foi' the reception sei-1l Valve-seat body, e, pneumatic valve of gieatei diameter than tlie bee-Jing edge of the seid valve-sent body end e. secondey fixed Velveseet for said pneumatic Velye Wiieieby th motion ci* play between the opposed Velveseets may be eilvinstec, to; tbe pnp'ose describefl.

"Witnesses D. Vy. GARDNER, GEO. WM. Minen. 

